Movable Roof Device

ABSTRACT

The invention concerns the field of roof devices for opening roofs. In particular, the invention concerns a roof device comprising sliding roof panels which are configured so as to be movable along a rail system. The invention also concerns an opening roof comprising the movable roof device. The invention also concerns the use of the roof device in a roof. The invention furthermore also concerns a method for opening and closing the roof device.

TECHNICAL FIELD

The invention concerns the field of roof devices for opening roofs. In particular, the invention concerns a roof device comprising sliding roof panels which are configured so as to be movable along a rail system. The invention also concerns an opening roof comprising the movable roof device. The invention also concerns the use of the roof device in a roof. The invention furthermore also concerns a method for opening and closing the roof device.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

A terrace covering is a structure typically consisting of posts and beams, and is freestanding or mounted against a gable end. A roof is then placed on the beams. This may be a fixed roof, but in modern residential building there is an increasing demand for opening roofs, for example opening flat roofs, i.e. roofs in which the surface runs almost horizontally without a slope. The roof filling of an openable roof may for example consist of a rollable tarpaulin, lamellae which rotate around their axis, or segments which can slide over each other. The segments may be panels which are partly made from (laminated) glass or plastic, such as PC or PMMA. Depending on the choice of material, the translucency and robustness of the roof may be matched to the desired application. Modern systems however only allow limited finishes of the existing roof fillings. It is a first aim of the present invention to provide an opening roof device with improved finishing possibilities, in particular on the flat underside of the flat roof.

Two important shortcomings of modern opening flat roofs are (splash-) water-tightness and water drainage. The connection between adjacent panels may sometimes be limited, whereby openings occur and rainwater can leak through the roof. Dirty rainwater can soil both the underside of the roof and the underlying terrace. The chance of poor connection is increased by repeated opening and closing of the roof, for example if dirt or leaves get between the panels. Good water drainage is difficult to achieve, in particular for completely flat roofs where water cannot flow away in the natural manner. Thus, due to puddling, standing water can exert pressure on the roof surface with the chance of damage, local sagging or leaking. A similar problem may occur during snowfall, wherein the roof may be subjected to heavy loads for long periods followed by a local collection of melting snow water. In addition, opening a wet roof can mean that dirty water falls onto the terrace below. It is furthermore an object of the present invention to provide an opening roof device with improved water-tightness and/or water drainage.

Opening and closing the roof may be controlled manually, but may also be motorized. Motorized systems are however complex and require separate control of each movable panel. As a result, there is more chance of faulty components. A faulty component can also partly block the correctly functioning panels, leading to complete stoppage of the drive system. It is a further object of the present invention to provide a roof device which is easier to both install and use, with an associated reduced risk of failure and/or defects.

There is therefore a need for a roof device which offers a solution to one or more of the above-mentioned problems.

SUMMARY

The present invention and the preferred embodiments thereof aim to offer a solution to one or more of the above-mentioned disadvantages of flat roofs. For this, the present invention concerns a roof device comprising sliding roof panels which are configured so as to be movable along a rail system. The invention also concerns an opening roof comprising the movable roof device. The invention also concerns the use of the roof device in a roof. The invention furthermore also concerns a method for opening and closing the roof device. The roof device according to the present invention can provide an improvement with regard to the (splash-) water-tightness and/or water drainage, stiffness and/or resistance to (snow) loads, finishing possibilities, translucency and/or sun protection.

The invention also concerns the field of devices for (opening) sliding structures such as vertical sliding walls. In particular, the invention provides a wall device comprising sliding wall panels which are configured so as to be movable along a rail system as described herein. For this, the present invention also concerns a wall device comprising sliding wall panels which are configured so as to be movable along a rail system. The invention also concerns a sliding wall comprising the movable wall device. The invention also concerns the use of the wall device in a sliding wall. The invention furthermore also concerns a method for opening and closing the wall device.

Various aspects of the invention are described below. Embodiments of one aspect are also embodiments of the other aspects. Preferred embodiments of one aspect are also preferred embodiments of the other aspects.

In one aspect, the invention concerns a roof device for an opening roof (or alternatively a wall device for an opening wall), comprising a plurality of stackable panels configured so as to be movable along a rail system, wherein the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for repeatably coupling to and decoupling from the connection point of an adjacent panel, so that on coupling, the adjacent panels lie aligned next to each other in the same plane (and preferably adjoin each other seamlessly), and on decoupling, the adjacent panels are or can be stacked above each other.

Where the term “roof” is used herein as an individual term or part of a term, in the alternative embodiment said term may be replaced by the term “wall” as an individual term or as part of the same term. For illustration, where the term “roof device” is used below, in the alternative embodiment this may be replaced by the term “wall device”.

According to one aspect, the invention concerns a roof device for an opening roof comprising a

-   -   plurality of stackable panels configured so as to be movable         along a rail system;     -   wherein the panels comprise a connection element and a         connection point,     -   wherein the connection element of each panel is configured for         repeatable coupling to and decoupling from the connection point         of an adjacent panel;     -   so that on coupling, the adjacent panels lie aligned in the same         plane, and on decoupling, the adjacent panels are or can be         stacked one above the other,     -   CHARACTERIZED IN THAT     -   a clip or a roller bearing is attached to an end of the         connection element and/or the connection point, wherein the clip         or the roller bearing is configured so as, during coupling, to         come into contact with an end of the connection point and/or the         connection element of the adjacent panel and limit the friction         between the connection element and the connection point.

According to one embodiment, a roof device is provided, wherein an end of the connection element and/or the connection point comprises a sliding clip configured for slidable coupling, and/or a roller bearing configured for rollable coupling.

The clip or the roller bearing may thus ensure that the (preferably metal) surfaces of adjacent profiles cannot damage each other, or only slightly damage each other, and/or can or do slide smoothly over one another on coupling.

In some embodiments, the coupling of the connection point and the connection element forms a gutter, preferably a gutter which is suitable for lateral water drainage.

In some embodiments, the coupling of the connection point to the connection element forms an intermediate space, preferably wherein the intermediate space is suitable for receiving an element, preferably a light-emitting element, for example an LED strip.

In some embodiments, the connection point forms a stop against which a connection element can engage or attach.

In some embodiments, the connection element forms a hook which can engage in or attach to the connection point.

In some embodiments, the connection point comprises an upwardly pointing body which extends laterally from a panel wall, preferably extends forward or rearward from a front or rear panel wall, preferably extends forward from a front panel wall.

In some embodiments, one end of the upwardly pointing body of the connection point is curved, so that at least part of said body extends back in the direction of the panel wall, preferably the direction of said front or rear panel wall, preferably the direction of said rear panel wall.

In some embodiments, the connection element comprises a downwardly pointing body which extends laterally from a panel wall, preferably extends forward or rearward from a front or rear panel wall, preferably extends rearward from a rear panel wall.

In some embodiments, one end of the upwardly pointing body of the connection point is curved, so that at least part of said body extends back in the direction of the panel wall, preferably the direction of said front or rear panel wall, preferably the direction of said front panel wall.

In some embodiments, the body of the connection element and/or the connection point is at least partially bent in order to form a curved surface with a shape which partially and preferably completely corresponds to the shape of the adjacent connection point and/or connection element.

In some embodiments, one end of the connection element and/or the connection point forms a sliding clip configured for sliding coupling.

In some embodiments, one end of the connection element and/or the connection point forms a roller bearing configured for rolling coupling.

In some embodiments, at least one panel, preferably each panel, comprises at least one stiffening element, preferably all panels comprise at least one stiffening element which is configured for supporting an adjacent panel, preferably a panel wall of the adjacent panel.

In some embodiments, the at least one stiffening element is arranged on a connection element of a panel and configured for supporting the connection point of the adjacent panel.

In some embodiments, at least one stiffening element comprises an upwardly pointing body which extends laterally from a front and/or preferably rear panel wall, preferably wherein the upwardly pointing body of at least one stiffening element stands approximately perpendicularly on the top panel wall or the connection element.

In some embodiments, the stiffening element is an L-shaped angled profile.

In some embodiments, the coupling and/or decoupling of adjacent panels sequentially follows the stacking order of the panels.

In some embodiments, the rail system is a single-track rail system, wherein the panels move along the same plane, preferably wherein the panels move sequentially next to each other.

In some embodiments, the rail system is a multi-track rail system, wherein the panels move along different, preferably parallel planes, preferably wherein the panels move simultaneously while stacked one above the other.

In one aspect, the invention concerns a wall device for an opening wall, comprising a plurality of stackable panels configured so as to be movable along a rail system, wherein the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for repeatably coupling to and decoupling from the connection point of an adjacent panel, so that on coupling, the adjacent panels lie aligned in the same plane, and on decoupling, the adjacent panels are or can be stacked next to each other.

In a further aspect, the invention concerns an opening roof for a terrace covering, comprising the roof device according to one or more embodiments as described herein.

In some embodiments, the invention concerns a roof device for an opening roof (or alternatively a wall device for an opening wall) comprising a plurality of stackable panels configured so as to be movable along a rail system, wherein the movable panels can be moved repeatably between a first closed (roof) state in which the panels lie aligned next to each other in the same plane (preferably seamlessly adjoining each other, i.e. overlapping and splash-watertight), and a second open (roof) state in which the panels lie aligned and stacked one above the other.

In some embodiments, the roof device comprises a connection system which is configured for repeatably coupling adjacent panels lying next to each other, preferably by a downward movement of a top panel along a panel wall of a bottom panel, preferably a rear or front panel wall of a top panel along a front or rear panel wall of a bottom panel, preferably a rear panel wall of a top panel along a front panel wall of a bottom panel, and/or a front panel wall of a top panel along a rear panel wall of a bottom panel.

In some embodiments, the roof device comprises a stacking system configured for repeatably coupling adjacent panels which are stacked one above the other, preferably by a sideways, preferably rearward movement of a top movable panel over a bottom movable panel.

In some embodiments, the panels comprise an engagement element and a corresponding notch, wherein the engagement element of each panel is configured for being repeatably placed in a notch of an adjacent panel, preferably in a notch of a bottom panel.

In a further aspect, the invention concerns a method for closing a roof device comprising a single-track rail system, preferably as described herein.

Preferably, the method comprises the steps:

-   -   (a) the provision of a plurality of panels stacked one above the         other and configured so as to be movable along the single-track         rail system;     -   (b) the preferably motorized control of an initial, preferably         bottom (movable) panel in order to move preferably forward along         the rail system;     -   (c) the coupling, by means of a connection system, of the         initial, preferably bottom (movable) panel to the plurality of         panels, preferably the coupling of the initial, preferably         bottom (movable) panel to an adjacent, preferably rear (movable)         panel so that the initial and the adjacent (movable) panels lie         aligned next to each other in the same plane; and     -   (d) the preferably sequential repetition of steps (b) and (c)         until all movable panels lie aligned next to each other in the         same plane, preferably adjoining each other seamlessly,         optionally wherein step (c) takes place simultaneously or during         step (b).

In some embodiments, the coupling by means of the connection system, between the initial, preferably bottom (movable) panel and the adjacent, preferably rear panel in step (c), takes place by a downward movement of the adjacent, preferably rear panel along a preferably rear panel wall of the initial, preferably bottom (movable) panel, wherein the adjacent, preferably rear (movable) panel transfers from a top position to an adjacent, preferably rear position.

In a further aspect, the invention concerns a method for opening a roof device comprising a single-track rail system, preferably as described herein.

Preferably, the method comprises the steps:

-   -   (a′) the provision of a plurality of panels lying next to each         other in the same plane and configured so as to be movable along         the single rail system, wherein the movable panels are coupled         together by means of a connection system;     -   (b′) the decoupling of the connection system of a rear (movable)         panel from the plurality of panels lying next to one another,         preferably the decoupling of the rear (movable) panel from an         adjacent, preferably front (movable) panel;     -   (c′) the preferably motorized control of an initial, preferably         front (movable) panel in order to move preferably rearward along         the rail system;     -   (d′) the stacking of the rear (movable) panel above at least one         panel of the plurality of panels, preferably the stacking of the         rear (movable) panel above the adjacent, preferably front         (movable) panel, whereby the adjacent, preferably front         (movable) panel becomes a new (movable) rear panel; and     -   (e′) the preferably sequential repetition of steps (b′) to (d′)         until all movable panels lie stacked one above the other,         preferably aligned, optionally wherein step (b′) and/or step         (d′) take place simultaneously or during step (c′).

In some embodiments, the decoupling of the connection system between the rear (movable) panel and the adjacent, preferably front (movable panel) in step (b′) takes place by an upward movement of the rear (movable) panel along a preferably rear panel wall of the adjacent, preferably front (movable) panel, whereby the rear (movable) panel transfers from an adjacent, preferably rear position to a top position.

In a further aspect, the invention concerns a method for closing a roof device comprising a multi-track rail system, preferably as described herein.

The method preferably comprises the steps:

-   -   (I) the provision of a plurality of panels stacked one above the         other and configured so as to be movable along the multiple rail         system, wherein the movable panels are preferably coupled         together by means of a stacking system;     -   (II) optionally, the decoupling of the stacking system of the         bottom (movable) panel from the plurality of panels stacked one         above the other, preferably the decoupling of the bottom         (movable) panel from an adjacent, preferably top and/or one from         bottom panel;     -   (III) the preferably motorized control of an initial, preferably         bottom (movable) panel in order to move preferably forward along         the rail system, whereby the adjacent, preferably top and/or one         from bottom (movable) panel becomes a new bottom (movable)         panel;     -   (IV) the preferably motorized control of the new bottom         (movable) panel in order to move preferably forward along the         rail system, whereby the adjacent, preferably top and/or one         from bottom (movable) panel becomes a new bottom (movable)         panel;     -   (V) the coupling of adjacent panels by means of a connection         system such that the adjacent (movable) panels lie aligned and         next to each other in the same plane, preferably the coupling of         the initial bottom (movable) panel to the new bottom (movable)         panel; and     -   (VI) the preferably sequential repetition of steps (III) to (V)         until all movable panels lie aligned next to each other in the         same plane, optionally wherein step (II), step (IV) and/or         step (V) take place simultaneously or during step (III).

The method preferably comprises the steps:

-   -   (i) the provision of a plurality of panels stacked one above the         other and configured so as to be movable along the multiple rail         system, wherein the movable panels are coupled together by means         of a stacking system, optionally wherein a bottom movable panel         is not coupled;     -   (ii) optionally, the decoupling of the stacking system of the         bottom (movable) panel from the plurality of panels stacked one         above the other, preferably the decoupling of the bottom         (movable) panel from an adjacent, preferably top and/or one from         bottom (movable) panel;     -   (iii) the preferably motorized control of an initial, preferably         top (movable) panel in order to move preferably forward along         the rail system, whereby the adjacent, preferably top and/or one         from bottom (movable) panel becomes a new bottom (movable)         panel;     -   (iv) the decoupling of the stacking system of the new bottom         (movable) panel from the plurality of panels stacked one above         the other, preferably the decoupling of the new bottom (movable)         panel from an adjacent, preferably top and/or one from bottom         (movable) panel;     -   (v) the coupling of adjacent (movable) panels by means of a         connection system such that the adjacent (movable) panels lie         aligned and next to each other in the same plane, preferably the         coupling of the bottom (movable) panel to the new bottom         (movable) panel; and     -   (vi) the preferably sequential repetition of steps (iii) to (v)         until all movable panels lie aligned next to each other in the         same plane, optionally wherein step (ii), step (iv) and/or         step (v) take place simultaneously or during step (iii).

In some embodiments, the decoupling of the stacking system between the bottom (movable) panel and the adjacent, preferably top and/or one from bottom (movable) panel in step (ii) or (II) takes place by a downward movement of the bottom (movable) panel away from a preferably bottom panel wall of the adjacent, preferably top and/or one from bottom (movable) panel.

In some embodiments, the decoupling of the stacking system between the new bottom (movable) panel and the adjacent, preferably top and/or one from bottom (movable) panel in step (iv) takes place by a downward movement of the new bottom (movable) panel away from a bottom panel wall of the adjacent, preferably top and/or one from bottom (movable) panel.

In some embodiments, the coupling by means of the connection system of the bottom (movable) panel to the new bottom (movable) panel in step (v) takes place by a downward movement of the new bottom (movable) panel along a preferably front panel wall of the bottom (movable) panel, whereby the new bottom (movable) panel transfers from a top position to an adjacent, preferably front position.

In a further aspect, the invention concerns a method for opening a roof device comprising a multi-track rail system, preferably as described herein.

The method preferably comprises the steps:

-   -   (I′) the provision of a plurality of panels lying next to each         other in the same plane and configured so as to be movable along         the multiple rail system, wherein the movable panels are coupled         together by means of a connection system;     -   (II′) the decoupling of the connection system of an initial,         preferably front (movable) panel (201) from an adjacent,         preferably rear (movable) panel;     -   (III′) the preferably motorized control of an initial,         preferably front (movable) panel in order to move preferably         rearward along the rail system, whereby the adjacent, preferably         rear (movable) panel becomes a bottom (movable) panel,         preferably a new front (movable) panel; and     -   (V′) the preferably sequential repetition of steps (II′) and         (III′) until all panels lie stacked one above the other,         preferably aligned, optionally wherein step (II′) takes place         simultaneously or during step (III′).

The method preferably comprises the steps:

-   -   (i′) the provision of a plurality of panels lying next to each         other in the same plane and configured so as to be movable along         the multiple rail system, wherein the movable panels are coupled         together by means of a connection system;     -   (ii′) the decoupling of the connection system of an initial,         preferably front (movable) panel from an adjacent, preferably         rear (movable) panel;     -   (iii′) the preferably motorized control of the initial,         preferably front (movable) panel in order to move preferably         rearward along the rail system, whereby the adjacent, preferably         rear (movable) panel becomes a bottom (movable) panel,         preferably a new front (movable) panel;     -   (iv′) the coupling, preferably by means of a stacking system, of         the initial, preferably front (movable) panel to the bottom,         preferably new front (movable) panel so that the initial and the         bottom (movable) panel lie stacked one above the other and         preferably aligned;     -   (v′) the preferably sequential repetition of steps (ii′) to         (iv′) until all movable panels lie stacked one above the other,         preferably aligned, optionally wherein step (ii′) and/or step         (iv′) take place simultaneously or during step (iii′).

In some embodiments, the decoupling of the connection system between the initial, preferably front (movable) panel and the adjacent, preferably rear (movable) panel in step (ii′) or (II′) takes place by an upward movement of the initial (movable) panel along a preferably front panel wall of the adjacent, preferably rear (movable) panel, wherein the initial (movable) panel transfers from an adjacent, preferably front position to a top position.

In some embodiments, the coupling of the stacking system between the initial, preferably front (movable) panel and the bottom, preferably new front (movable) panel in step (iv′) takes place by a sideways, preferably rearward movement of the initial, preferably front (movable) panel over a preferably top panel wall of the bottom, preferably new front (movable) panel.

DESCRIPTION OF THE FIGURES

In order to better indicate the features of the invention, in the attached figures some preferred embodiments of the present invention are described, with no limitative character. The numerical references are discussed in more detail in the examples.

Throughout the figures, claims and examples, the following numbering is retained: 10—opening roof; 100—movable roof device; 200—movable panels (201—first movable panel; 202—second movable panel; 203—third movable panel); 210—fixed (not movable) panel; 220—connection element; 221—gutter; 225—connection point; 226—intermediate space; 230—sliding clip; 235—roller bearing; 240—guide element; 245—notch; 250—engagement element; 290—stiffening element; 295—second stiffening element; 300—rail system; 310—single-track rail system (311—front guide rail; 312—rear guide rail); 320—multi-track rail system (321—first guide rail for a first movable panel; 322—second guide rail for a second movable panel; 323—third guide rail for a third movable panel); 330—front guide rails of the multi-track rail system (331—first front guide rail; 332—second front guide rail; 333—third front guide rail); 340—rear guide rails of the multi-track rail system (341—first rear guide rail; 342—second rear guide rail; 343—third rear guide rail).

In the figures, the left-hand edge is regarded as “rear” and the right-hand side is regarded as “front”, wherein the front typically points in the direction of opening in a roof, and wherein the rear typically points in the direction of stacking in a roof. In figures with two panel walls, accordingly the left panel wall is the “rear panel wall”, and the right panel wall is the “front panel wall”. In other words, front and/or rear approximately follow the direction of movement of the panels from the open roof state to the closed roof state.

FIG. 1 shows a diagrammatic depiction of a roof device (100) comprising a plurality of panels (200) configured so as to be movable along a single-track rail system (310).

FIG. 2 shows a diagrammatic depiction of a roof device (100) comprising a plurality of panels (200) configured so as to be movable along a single-track rail system (310), wherein the roof device furthermore comprises a connection system.

FIG. 3 shows a movable panel (201) comprising a connection system.

FIG. 4 shows a coupling between movable panels (201, 202) by means of a connection system.

FIG. 5 shows a diagrammatic depiction of a roof device (100) comprising a plurality of panels (200) configured so as to be movable along a multi-track rail system (320).

FIG. 6 shows a diagrammatic depiction of a roof device (100) comprising a plurality of panels (200) configured so as to be movable along a multi-track rail system (320).

FIG. 7 shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320), wherein the roof device furthermore comprises a connection system.

FIG. 8A shows a coupling between movable panels (201, 202) by means of a first preferred embodiment of a connection system.

FIG. 8B shows a coupling between movable panels (201, 202) by means of a second preferred embodiment of a connection system.

FIG. 9A shows a coupling between movable panels (201, 202) by means of a first preferred embodiment of a connection system from a top perspective.

FIG. 9B shows a coupling between movable panels (201, 202) by means of a second preferred embodiment of a connection system from a bottom perspective.

FIG. 10 shows a diagrammatic depiction of a coupling between movable panels (201, 202) by means of a second preferred embodiment of a connection system.

FIG. 11A shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320), in the open roof state, wherein the roof device furthermore comprises a preferred embodiment of a connection system.

FIG. 11B shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320), in the closed roof state, wherein the roof device furthermore comprises a preferred embodiment of a connection system.

FIG. 12A shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320) in the open roof state, wherein the roof device furthermore comprises a preferred embodiment of a connection system.

FIG. 12B shows a detailed depiction of movable panels stacked one above the other in the open roof state.

FIG. 13 shows an illustration of a movable panel (201) comprising a stacking system in a side view.

FIG. 14 shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320), wherein the roof device furthermore comprises a stacking system.

FIG. 15 shows a diagrammatic depiction of a roof device (100) comprising panels (200) configured so as to be movable along a multi-track rail system (320), wherein the roof device furthermore comprises a stacking system.

FIG. 16 shows a depiction of a terrace covering comprising an opening roof (10).

DETAILED DESCRIPTION

Before describing the present systems and methods according to the invention, it must be understood that the invention is not restricted to the specific systems and methods or combinations described, since such systems and methods and combinations may naturally vary. It should also be clear that the terminology used herein is not intended to be restrictive, since the scope of the present invention is limited solely by the appended claims.

All documents which are cited in the present specification are incorporated herein in full by way of reference.

As used hereinbelow in this text, the singular forms “a”, “an” and “the” comprise both the singular and the plural, unless the context clearly denotes otherwise. The terms “comprise”, “comprises” as used herein are synonymous with “inclusive”, “include” or “contain”, “contains” and are inclusive or open, and do not exclude additional items, elements or method steps which have not been mentioned. The terms “comprise”, “comprises” include the term “consist of”, “consisting of”.

The enumeration of numerical values by means of ranges of figures comprises all values and fractions included in these ranges as well as the cited end points. The term “approximately” as used when referring to a measurable value, such as a parameter, a quantity, a time period and so on, is intended to include variations of +/−10% or less, preferably +/−5% or less, more preferably +1-1% or less, and still more preferably +1-0.1% or less, of and from the specified value, in so far as the variations are applicable in order to function in the disclosed invention. It should be understood that the value to which the term “approximately” refers per se has also been disclosed.

In the following passages, various aspects of the invention are defined in more detail. Each aspect thus defined may be combined with another aspect or aspects unless clearly stipulated to the contrary. In particular, a feature indicated as “preferred” or “advantageous” may be combined with other features or properties described as “preferred” and/or “advantageous”. Reference in this specification to “one embodiment” or “an embodiment” means that a specific function, structure or characteristic described in connection with the embodiment is applicable in at least one embodiment of the present invention. Where the phrases “in one embodiment” or “an embodiment” appear at various points in the specification, they do not necessarily refer to the same embodiment although this is not excluded. Also, the features, structures or characteristics described may be combined in any suitable fashion, as will be clear to a person skilled in the art, on the basis of this description. The embodiments described and claimed in the claims may be used in any combination. In the present description of the invention, reference is made to the appended drawings which form part thereof and which illustrate specific embodiments of the invention. Numerals in brackets or in bold linked to specific elements illustrate the elements concerned as examples without thereby restricting the elements. It must be understood that other embodiments may be used and structural or logical changes may be made without leaving the scope of the present invention. The following detailed description should not be regarded as restrictive, and the scope of the present invention is defined by the appended claims.

Unless otherwise defined, all terms disclosed in the invention, including technical and scientific terms, have the meanings which those skilled in the art usually give them. As a further guide, definitions have been incorporated in order to further explain terms which are used in the description of the invention.

An aspect of the invention concerns a device comprising a plurality of stackable panels configured so as to be movable along a rail system. This device may be suitable for a sliding structure such as a sliding roof or sliding wall. It is clear that the embodiments described below of one structure are also applicable to other similar structures, i.e. suitable or preferred embodiments of the roof device or sliding roof are also suitable or preferred embodiments of the wall device or sliding wall, and vice versa. The invention concerns a roof device for an opening roof. The roof device is particularly suitable for a flat opening roof. A flat roof is a roof in which the roof surface is approximately horizontal, i.e. has a slope of less than 10° and preferably less than 5°, for example less than 2° or 1°. The degree of slope is determined by the height difference between adjacent panels; the separate panels may for example have a curved surface without relative height difference. A roof device concerns a movable device for filling in a roof frame. When the movable roof device is mounted in a roof, it is described as an opening roof. The opening roof may form part of a structure comprising a roof structure with an opening and upright walls, such as a terrace covering, pergola, car port and similar. The term “opening” means that the roof can slide both open and closed. The movable device is mounted in the roof such that movement is possible between at least two states, namely a first closed roof state and a second open roof state. Optionally, the roof device may be configured to move to one or several intermediate states in which the roof is only partially open, for example half open or one quarter open.

The invention alternatively concerns a wall device for a sliding wall. The wall device is particularly suitable for a flat sliding wall. The sliding wall may form part of a structure comprising a wall structure with an opening and upright walls. The term “sliding” means that the wall can slide both open and closed. The movable wall device is mounted in the wall such that movement is possible between at least two states, namely a first closed wall state and a second open wall state. Optionally, the wall device may be configured to move to one or several intermediate states in which the wall is only partially open, for example half open or one quarter open.

The roof device comprises at least a plurality of panels which form the roof filling. A panel is a rigid structure which forms a part or segment of the roof device; it may therefore also be called a roof panel. A panel typically has a bar- or block-like structure consisting of six approximately rectangular surfaces: namely a top surface, a bottom surface (or base surface), and four side surfaces. The bottom surface is preferably approximately the same size as the top surface. The term “approximately” should be interpreted to mean that the body or structure concerned has a substantially similar geometric form, i.e. apart from some roundings, bends, protrusions, connection elements, grooves, slots, ribs, openings, connecting pieces, stiffening means and similar; for further clarification, reference is made to figures.

All references to an orientation of the panels should be interpreted to mean a reference to the state on installation in the roof or roof frame: the bottom panel wall or bottom wall is a panel wall which is or will be oriented in the direction of the bottom surface (the ground, e.g. the terrace floor), while the top panel wall or top wall is the panel wall which is or will be oriented in the direction of the top surface (the sky, e.g. the open air). All references to a direction of the panels should be interpreted with reference to the movement direction of the panels along the rail system from the open roof state, in which the panels lie stacked above each other, to the closed roof state, in which the panels lie next to each other in the same plane; the front panel walls or front walls are oriented (in an open roof state) in the direction of the open roof space, while the rear panel walls or rear walls are oriented (in an open roof state) in the direction of the roof frame in which the roof device is or can be mounted. A panel thus moves forward in the direction of its front panel wall, i.e. from an open roof state to a closed state, and correspondingly a panel moves rearward in the direction of its rear panel wall, i.e. from a closed state to an open roof state. For further clarification, reference is made to the figures and examples. Throughout the text, the terms edge, wall, side, surface may be used interchangeably: for example, top side, top edge, top wall, top surface should be considered to be equivalent. The rail walls are the remaining side walls of the movable panels which are oriented in the direction of the rail system (mounted on opposite sides of the roof frame) and are preferably in contact with part of the rail system. The panel walls may be partially or completely curved (i.e. a curved surface); an arcuate surface of the top panel wall may for example ensure an improved water drainage to the side edges of the roof.

For wall devices, an equivalent definition is applied, wherein the exterior is regarded as the top surface, and the interior as the bottom surface. A plurality of panels means that there are at least two panels configured so as to be movable along a rail system; the panels may move along the rail system or parts of the rail system in a direction which allows the roof to be opened and closed. Preferably, the panels are arranged so as to be slidable in the rail system; the panels can move slidably or slide along the rail system or parts of the rail system. A rail system typically comprises one or more guide rails which are or can be mounted on the roof. Examples of suitable rail systems for the present roof device are discussed in more detail separately. There are various ways of enabling a movement of panels in a rail system. The panels may comprise movement elements which are placed in the rail system or parts of the rail system and allow a movement of the panels. An example of a suitable movement element is a roller bearing which can roll or slide over the surface of a guide rail. All panels may be configured movably, but also at least one panel may be fixed immovably. Such a fixed panel may for example serve as a support, limit or coupling point. In some embodiments, there is a minimal play between stacked panels so that loads (e.g. snow loads) are borne by all stacked panels. This may be achieved by the top panel resting on the panels below. If for example the panels engage in each other with roller bearings, in the stacked position these roller bearings may rest on an underlying profile.

The movable panels are preferably stackable; they can be stacked one above the other. The movable panels are stackable in a (completely) open roof state. Preferably, the panels are stacked above each other and aligned. An aligned stack means that the stack has virtually no deviations; the top and bottom panel walls of the adjacent stacked panels cover each other approximately completely. Thus in the open roof state, the open roof space can be limited to the surface area of a single panel. This is contrary to other roof devices in which often, only some of the panels can slide (e.g. wherein only one panel slides over a second panel), and/or the panels can only slide over each other partially (e.g. when the panels protrude on one side and form a stepped structure), whereby the scope of the open roof space is limited. As well as an aesthetic improvement, the present roof device ensures more light incidence in an open roof state. Optionally, the stacked panels may lie one on top of the other; here, the top or bottom panel walls of the top or bottom panels come into contact with each other. In a stacked state, the weight of the top panels can be supported by the bottom panels, or the weight of each panel may be borne separately for example by the rail system and/or secondary support elements or a combination of both.

The movable panels are preferably alignable in the same plane; they may be aligned in the same plane. The movable panels are aligned in the same plane in a (completely) closed roof state. In the same plane means that the panels lie in one plane, wherein the panels are arranged next to each other at approximately the same height (no step structure) in a straight line (no curvature). The tangent of the top and/or bottom surfaces of each panel, in the fully closed roof state, passes through the respective top and/or bottom surfaces of the adjacent panels; in other words, apart from some protrusions (e.g. stiffening elements) or openings (e.g. gutters for water drainage, or for installation of lighting) provided in the top and/or bottom panel walls; for further clarification, reference is made to the figures. The movable panels are preferably seamlessly connectable; they can connect to each other seamlessly. A seamless connection means that the top and/or bottom surfaces of adjacent panels follow each other continuously without openings or interruptions between the surfaces of the adjacent panels; any interruptions may be filled by decorative elements lighting (LED). In a preferred embodiment, the bottom surfaces of the panels adjoin each other seamlessly to form a continuous, flat underside of the roof. As well as an aesthetic improvement, the present roof device ensures an improved connection between adjacent panels. The seamless connection means that it is not possible for water or dirt to penetrate through openings between adjacent panels. In this way, the present roof device ensures a completely drip-free water-tightness. This is in contrast to other panel devices in which the panels slide in different planes, and thereby form a step or sawtooth structure in which dirt or water can settle or leak.

There may be countless variations on the dimensions of the panels and accordingly also on the dimensions of the roof device. The dimensions may inter alia be adapted to the scope of the roof, the number of movable panels, the material from which the panels are made etc. As an example, a panel may have a length of at least 0.50 m to at most 5.00 m; e.g. 2.00 m, 2.50 m, 3.00 m, 3.50 m, 4.00 m, 4.50 m etc. As an example, a panel may have a width of at least 0.50 m to at most 3.00 m; e.g. 1.00 m, 1.50 m, 2.00 m, etc. As an example, a panel may have a height of at least 1 cm to at most 50 cm; e.g. 5 cm, 10 cm, 15 cm, 20 cm, 25 cm etc. In an exemplary embodiment, a roof with the following dimensions is considered: 4.50 m×6.20 m. In a first example, this roof may be filled with 6 movable panels, wherein each panel measures 950 mm×4200 mm (after deduction of the frame in which the illustrative roof filling may be installed). In a second example, the same roof may be filled by 8 panels, wherein each panel measures 715 mm×4200 mm. The advantages and disadvantages of the various dimensions are assumed to be known to the person skilled in the art. Alternatively or additionally, several roof devices may be placed next to or against each other in separate rows and/or columns. In principle, there is no restriction on the maximum roof area which can be filled.

The panels may be made from different materials or even combinations of materials. The material choice may be adapted inter alia to the scope of the roof (rigidity), the application of the roof device (translucent or opaque), the climate in which the structure is located (lots of rain or dry), etc. As an example, a panel may be made of metal (e.g. aluminium), plastic (e.g. PC, PMMA, PVC), (laminated) glass, textile etc. and/or combinations of different material types. The advantages and disadvantages of the various material types are assumed to be known to the person skilled in the art. The panels may in some cases also be equipped with lighting (LED) or decorative elements.

In one aspect, the invention concerns a roof device for an opening roof (or alternatively a wall device for an opening wall), comprising a plurality of stackable panels configured so as to be movable along a rail system, wherein the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for repeatably coupling to and decoupling from the connection point of an adjacent panel, so that on coupling, the adjacent panels lie aligned next to each other in the same plane (and preferably adjoin each other seamlessly), and on decoupling, the adjacent panels are or can be stacked above each other.

The roof device preferably comprises a connection system, in which each movable panel is configured for repeatably coupling to and decoupling from one or two adjacent panels by means of the connection system, such that on coupling, the adjacent panels adjoin each other (preferably seamlessly) and are aligned, lying in the same plane; and on decoupling, the adjacent panels are or can be stacked one above the other. Preferably, each panel comprises a connection element and a connection point, wherein the connection element of each panel is configured for repeatable coupling to and decoupling from the connection point of an adjacent panel.

The term adjacent herein refers to an adjoining or neighbouring panel both in the height direction (e.g. on top or below) or in the length direction (for example in front or behind); adjacent does not mean that there is or must be direct contact between the two adjacent panels, but that the two adjacent panels are the two panels closest together.

The connection system is a repeatable coupling system wherein adjacent movable panels, preferably lying next to each other, can be coupled together on transition from an open roof state in which the panels lie stacked one above the other, to a closed roof state in which the panels lie in the same plane (and preferably adjoin each other seamlessly), and wherein the adjacent panels are decoupled again on transition from a closed roof state to an open roof state. The connection system may ensure a better connection of adjacent panels. This has the advantage that the chance of incorrect or incomplete alignment of panels can be limited or totally avoided. An improved connection can also improve the (splash-) water-tightness of the roof device. The connection system may ensure that the loads can be better distributed between coupled panels; a heavy load on one panel may be partly absorbed by the neighbouring panels. The connection system may ensure that the panels also adjoin each other despite the presence of open spaces between the panels on the underside and/or top surface of the roof; for example, an intermediate space for receiving lighting or a gutter for water drainage. The connection system may also ensure a seamless connection of adjacent panels, for example on the underside and/or top surface of the roof.

The connection system may be configured for coupling of two panels which lie partially and preferably completely next to each other: a first panel and a second panel. On coupling, the first panel may come to lie in the same plane next to the overlying or underlying second panel; the front and rear panel walls of the two coupled panels then partly and preferably completely overlap. Preferably, the coupling is achieved by a downward movement of a first top panel relative to a second bottom panel. Preferably, during coupling, the second bottom panel is not movable; the freedom of movement of the second panel may be partly blocked for this purpose. Preferably, on coupling, the panels may come to lie aligned next to each other in one plane; the respective front and rear panel walls of the two coupled panels then partly and preferably completely overlap.

On decoupling, the first panel may move below or above the second panel; the top and bottom panel walls of the two coupled panels then partly and preferably completely overlap. The decoupled panels are then arranged stackably or are stacked. Preferably, the connection system is configured for decoupling of two mutually adjacent panels by an upward movement of the first panel relative to the second adjacent panel. Preferably, during decoupling, the second adjacent panel is not movable. Preferably, on decoupling, the panels come to lie stacked on top of or below one another; the respective top and bottom surfaces of the two decoupled panels then overlap partly, preferably completely.

In a preferred embodiment in which the roof device comprises a single-track rail system, the connection system may furthermore ensure that the coupled panels can move along the single-track rail system aligned in the same plane. Preferably, the aligned and coupled panels move simultaneously along the single-track rail system. This has the advantage that control of all movable panels can be restricted to control of one or a limited number of panels in the sequence of aligned panels, and hence no secondary coupling system or control system need be provided. Preferably, the control of the movable panels is limited to control of one sidemost movable panel which must move first, and pull or push all coupled panels with it along the single-track rail system by means of the connection system. The complexity of the roof device can thereby be reduced. By way of example, reference is made to example 3.

The connection system may comprise a connection element which is configured for repeatable coupling to and decoupling from a complementary connection point; the connection element and the connection point can be coupled and decoupled repeatably. At least some panels and preferably each panel of the plurality of movable panels may comprise a connection element and/or a connection point; the connection element of a (first) panel can be coupled to a connection point of an adjacent (second) panel; then the connection element of the adjacent (second) panel can be coupled to a connection point of a respective adjacent (third) panel, and so forth. The connection element and the connection point may be arranged in one and the same plane. Preferably, the connection elements and connection points are arranged aligned in the same plane of the movable panels; the coupled connection elements and connection points preferably do not protrude from the top and/or bottom surface of the roof in a closed roof state.

The connection point may form a stop on which a connection element of an adjacent panel may engage or attach; the connection point may form a hook point. Preferably, the stop is a C-shaped or L-shaped stop. The connection point may comprise an upwardly pointing body which extends laterally from a panel wall of a movable panel. Preferably, the body is an upwardly pointing body which extends forward and/or rearward from a panel wall of the movable panel. The body may extend from a front or rear panel wall of the movable panel; preferably a front panel wall. The body may be partly or completely curved so that a first part of the body extends forward and/or rearward, and a second part of the body extends upward. Alternatively, the body may be partly or completely curved so that a first part of the body extends upward, and a second part of the body extends forward and/or rearward. This bend may be gradual or sudden, or be stepped with a plurality of successive smaller bends. Preferably, the curved connection point has a shape which partly or completely corresponds to the shape of a complementary connection element; preferably, the connection element of an adjacent panel.

One end of the body may be partly or completely curved so that at least part of the connection point extends back in the direction of the panel wall of said panel, preferably back in the direction of the front or rear panel wall of said panel. Alternatively or additionally, the connection point may comprise several components, for example a first body which extends laterally from the front and/or rear panel wall of a movable panel, and a second upwardly and/or downwardly pointing body which stands squarely on the first body, preferably on or near an end of the first body. The end of the second body may be partly or completely curved so that at least part of the second body extends back in the direction of the front and/or rear panel wall of said panel.

In a preferred embodiment, the connection point comprises an upwardly pointing body which extends forward from a front panel wall of a movable panel. In a preferred embodiment, the connection point comprises an upwardly pointing body which extends rearward from a rear panel wall of a movable panel. In a more preferred embodiment, the connection point comprises a body which first extends partly forward from a front panel wall of the movable panel, then extends partly upward, and finally extends rearward back in the direction of said rear panel wall. The connection element may form a structure which can engage in or attach to a connection point of an adjacent panel; the connection element may form a hook. Preferably, the hook is an L-shaped or stepped hook. The connection element may comprise a downwardly pointing body which extends laterally from a panel wall of a movable panel. Preferably, the body is a downwardly pointing body which extends forward and/or rearward from a panel wall of a movable panel. The body may extend from a front and/or rear panel wall of a movable panel; preferably a rear panel wall. The body may be partly or completely bent in order to form a curved surface. The body may be partly or completely curved so that a first part of the body runs downward, and a second part of the body runs forward and/or rearward. Alternatively, the body may be partly or completely curved so that a first part of the body runs forward and/or rearward, and a second part of the body runs downward. Preferably, the curved connection element has a shape which partly or completely corresponds to the shape of a complementary connection point; preferably, the connection point of an adjacent panel.

One end of the body may be partly or completely bent so that at least part of the connection element extends back in the direction of the panel wall of said panel, preferably back in the direction of the front or rear panel wall of said panel. Alternatively or additionally, the connection point may comprise several components, for example a first body which extends laterally from the front and/or rear panel wall of a movable panel, and a second upwardly and/or downwardly pointing body which stands squarely on the first body, preferably on or near an end of the first body.

In a preferred embodiment, the connection point comprises a downwardly pointing body which extends forward from a front panel wall of a movable panel. In a preferred embodiment, the connection point comprises a downwardly pointing body which extends rearward from a rear panel wall of a movable panel. In a more preferred embodiment, the connection point comprises a body which first extends partly rearward from a rear panel wall of the movable panel, then extends partly downward, and finally extends forward back in the direction of said rear panel wall.

In a preferred embodiment in which the roof device comprises a stiffening element, the connection point may be connected to the stiffening element. The stiffening element may be arranged on the body of the stiffening element described above. The stiffening element is preferably arranged on part of the stiffening element which extends laterally from a panel wall, preferably on a part which extends rearward from a rear panel wall. The stiffening element may be extruded together with the connection point in order to improve the stiffness. The presence of the stiffening element allows the connection element to support an adjacent panel when coupled to the connection point. In this way, the connection system may ensure that the loads can be even better distributed between coupled panels and better absorbed.

A coupling of the connection point of a (first) movable panel with a connection element of a (second) movable panel may form a gutter between the panel walls, preferably between the rear panel wall of the first panel and the front panel wall of the second panel. The opening of the gutter is directed upward; the gutter may form a channel or seam between the adjacent panels on the top surface of the roof device in a closed roof state. The gutter may be suitable for water drainage, preferably suitable for lateral water drainage; lateral here refers to the side edge of the roof in the direction of the roof frame, i.e. perpendicular to the movement direction of the panels. The gutter is preferably watertight. Preferably, the gutter is a U-shaped gutter. Preferably, a plurality of gutters are formed at regular intervals on the top surface of the closed roof. These gutters may be suitable for water drainage, for example of rainwater or melting snow water. Thus the connection system may improve the (splash-) water-tightness and water drainage of a roof device.

A coupling of the connection point of a (first) movable panel with a connection element of a (second) movable panel may form an intermediate space, preferably between the rear panel wall of the first panel and the front panel wall of the second panel. The intermediate space is directed downward; this intermediate space may form a channel or seam between the adjacent panels on the bottom surface of the roof device in a closed roof state. Optionally, the intermediate space may be filled and/or closed by a seamless connection of adjacent panels on the bottom surface of the roof device. This intermediate space may be coloured darker in order to be less evident, or may accommodate a decorative element. Preferably, the intermediate space is suitable for receiving an element, preferably a light-emitting element, for example an LED strip, and optionally for accommodating the necessary electrical wiring. Alternatively or additionally, the element may also be a heating element, a (part of a) sound installation, or an aesthetic element e.g. a wooden strip.

Thus the connection system may improve the finishing possibilities of a roof device.

Optionally, the connection element and/or the connection point may furthermore comprise a clip which can be pushed onto or over an end of the connection element and/or the connection point; this is a sliding clip. The clip may ensure that the connection element can couple slidably with the connection point. During coupling, the clip may for example come into contact with an end of the connection element or the connection point of an adjacent panel, whereby the connection element or the connection point may slide over the clip. On coupling, the clip may be partially clamped between the connection element and the connection point. The clip preferably has a low coefficient of friction in order to improve sliding. The clip may ensure that the (preferably metal) surfaces of adjacent profiles cannot damage each other, or only slightly damage each other, and/or can or do slide smoothly over one another on coupling.

Optionally, the connection element and/or the connection point may furthermore comprise a roller bearing which is or can be attached to an end of the connection element and/or the connection point. The roller bearing may ensure that the connection element can couple rollably with the connection point. During coupling, the roller bearing may for example come into contact with an end of the connection element or the connection point of an adjacent panel, whereby the connection element or the connection point may roll over the roller bearing. On coupling, the roller bearing may be partially clamped between the connection element and the connection point. Part of the body of the adjacent connection element or connection point may be curved in order to partially or completely receive the roller bearing; in this way, the roller bearing is clamped on coupling. The roller bearing preferably has a high coefficient of friction in order to improve grip, and the roller bearing then rolls instead of sliding. The roller bearing may ensure that the (metal) surfaces of adjacent profiles cannot damage each other, or only slightly damage each other, and/or can or do roll smoothly over one another on coupling.

Additionally or alternatively, in a closed roof state, the roller bearing of a top panel may make contact with the top panel wall of an underlying adjacent panel. The top panel may thereby be partly supported on the underlying profile. The loads on the top panel may be borne by the underlying panels, preferably by the plurality of panels stacked one above the other.

Optionally, the connection element and/or the connection point may furthermore comprise a flexible intermediate piece or closure which is arranged on or over the surface of the profiles, in particular partly or completely over the connection element and/or the connection point. The flexible intermediate piece may thus ensure an improved watertight closure between the connection element and the connection point.

The panels may comprise a stiffening element which is configured so as to support an adjacent panel. The stiffening element may thus improve the stiffness of the adjacent panel, whereby there is less chance of faulty or poor connection. The stiffening element may comprise an upwardly pointing body which extends laterally from a panel wall. Preferably, the stiffening element extends from a rear panel wall; the stiffening element may then support a front panel wall of the adjacent panel. The upwardly pointing body may stand perpendicularly on the top panel wall or the connection element, or form a right angle relative to a tangent over the top surface of the panel (if the top panel wall is curved). The stiffening element may be an L-shaped angled profile attached to or forming part of the rear panel wall.

The stiffening element may be connected to or in connection with a connection element which preferably extends from a rear panel wall of a (first) panel; the stiffening element may then support a connection point which preferably extends from a front panel wall of an adjacent panel. The stiffening element and the connection element may be extruded together. This embodiment is described in more detail in the description below.

Optionally or additionally, one or more panels may comprise a second stiffening element. The second stiffening element is preferably arranged on an opposite wall to the first stiffening element, for example a front panel wall and a rear panel wall. The front panel walls of the movable panels may, in closed roof state (stacked one above the other), be supported by engaging in the rear panel wall of the adjacent panel with the first stiffening element. The front panel wall of the top panel however has no adjacent panel wall for attachment and support. In order to resolve this, the front panel wall of the top panel may be provided with a second stiffening element. The second stiffening element thereby improves the stiffness of the panels stacked one above the other, whereby the panels can bear a heavier load, for example in snowfall.

When a plurality of stiffening elements is provided on a plurality of movable panels, in a closed roof state a rib structure may be created on the top surface of the roof. This rib structure may improve the stiffness and resistance of the complete roof device, and accordingly also reduce or prevent the chance of sagging or flexing of the roof, for example as a result of snowfall or accumulation of branches or leaves.

In a further aspect, the invention concerns an opening roof comprising a roof device according to one or more embodiments as described herein. The roof typically comprises a roof frame onto which the rail system can be mounted. Suitable or preferred embodiments of the roof device are also suitable preferred embodiments of the opening roof.

In a further aspect, the invention concerns a terrace covering comprising an opening roof according to one or more embodiments as described herein. The terrace covering typically comprises columns and beams, on or in which the opening roof can be placed. Suitable or preferred embodiments of an opening roof are also suitable or preferred embodiments of the terrace covering.

In a further aspect, the invention concerns a use of a roof device as a roof filling for a terrace covering. Suitable or preferred embodiments of the roof device are also suitable or preferred embodiments of the roof filling.

In a further aspect, the invention concerns a sliding wall comprising a wall device according to one or more embodiments as described herein. The wall typically comprises a wall frame onto which the rail system can be mounted. Suitable or preferred embodiments of the wall device are also suitable or preferred embodiments of the sliding wall.

In a further aspect, the invention concerns a wall covering comprising a sliding wall according to one or more embodiments as described herein. The wall covering typically comprises columns and beams, on or in which the sliding wall can be placed. Suitable or preferred embodiments of a sliding wall are also suitable or preferred embodiments of the wall covering.

In a further aspect, the invention concerns a use of the wall device as a wall filling for a wall covering. Suitable or preferred embodiments of the wall device are also suitable or preferred embodiments of the wall filling.

In a further aspect, the invention concerns a number of methods for opening and closing a roof device according to one or more embodiments as described herein. The opening of the roof device here refers to a movement of the movable panels from a closed roof state to an open roof state; the closing of the roof device here refers to a movement of the movable panels from an open roof state to a closed roof state. All references to a vertical position of the panels should be interpreted with reference to the position of the panels in an open roof state, wherein the panels are stacked one above the other. An overlying panel is a panel which lies above the panel in question, while an underlying panel lies below said panel. A top panel is furthermore the topmost panel which lies completely on top of the panels stacked one above the other (in an open roofed state), while a bottom panel is the bottommost panel which lies completely below the panels stacked one above the other (in an open roof state). All references to a horizontal position of the panel should be interpreted with reference to the position of the panels in a closed roof state, wherein the panels lie aligned and next to each other in the same plane. An adjacent panel is a panel which lies next to the panel in question; this may be both in front of or behind said panel; a front panel lies in front of said panel (i.e. in the direction of the front panel wall) and a rear panel lies behind said panel (i.e. in the direction of the rear panel wall). A front panel is furthermore the first panel which lies completely in front of the panels lying next to one another (in a closed roofed state), while the rear panel is the last panel which lies completely after the panels lying next to one another (in a closed roof state). Correspondingly to the above definitions, a panel moves forward in the direction of its front panel wall, rearward in the direction of its rear panel wall, upward in the direction of its top panel wall, and downward in the direction of its bottom panel wall.

EXAMPLES

By way of example, reference is made to the figures. The embodiments illustrated in the figures concern preferred embodiments of the present invention and should in no way be interpreted as a restriction.

Example 1: Single-Track Rail System

FIG. 1 shows a diagrammatic depiction of a roof device (100) comprising three panels (200) configured so as to be movable along a single-track rail system (310). The movable panels move in one and the same plane; they preferably move slidably.

FIG. 1(a) In a first open roof state, all movable panels (200) are aligned and stacked one above the other; the top panel wall of the first bottom panel (201) is fully covered by the bottom panel wall of the second adjacent panel (202), and the top panel wall of the second panel (202) is fully covered by the bottom panel wall of the third top panel (203). In FIG. 1(b), the first bottom panel (201) is controlled so as to move along the single-track rail system (310) in the forward direction (i.e. in the direction of the front panel wall); this forward movement direction is indicated by a dotted arrow. FIG. 1(c) When the first panel (201) moves completely from below the panels (200) stacked one on top of the other, the second panel (202) moves downward in order to end next to the first panel (201) on the single-track rail system (310); this downward movement direction is indicated by a dotted arrow. FIG. 1(d) The second panel (202) can move forward together with the first panel (201). As a result, the third top panel (203) can also move downward. FIG. 1(e) All movable panels (200) have moved sequentially (203) forward and/or downward until all movable panels (200) lie aligned next to each other in the same plane (and preferably adjoin each other seamlessly). The first bottom panel (201) has become the front panel (201), and the third top panel (203) has become the rear panel (201).

FIG. 2 shows a diagrammatic depiction of a roof device (100) comprising three panels (200) configured so as to be movable along a single-track rail system (310), wherein the roof device (100) furthermore comprises a connection system. The connection system comprises a connection element (220) and a complementary connection point (225); each movable panel (200) which is configured for coupling to adjacent panels comprises a downwardly pointing connection element (220) which is arranged on a front panel wall, and an upwardly pointing connection point (225) which is arranged on a rear panel wall. The single-track rail system (310) comprises a bottom (311) and a top (312) guide rail which extend in a direction along which the opening roof slides open and closed. For the sake of simplicity, only the guide rails on one side of the rail system are shown in the illustration; the guide rails arranged on the opposite side of the roof frame are not shown. At a first end in the direction of the rear panel walls, the guide rails run (obliquely) upward so that the panels can be stacked one above the other and aligned. Each movable panel (200) is preferably provided with at least one roller bearing per guide rail (311, 312); at least four roller bearings in total.

Correspondingly to the above-mentioned example, FIG. 2(a) shows the movable panels (200) stacked one above the other and aligned. FIG. 2(b) The first panel (201) moves forward along the guide rails (311, 312) of the single-track rail system (310). FIG. 2(c) The forward movement causes the connection point (225) arranged on the rear panel wall of the first panel (201) to overlap with the connection element (220) arranged on the front panel wall of the second panel (202). FIG. 2(d) As a result, the second panel (202) is able to move downward. FIG. 2(e) The downward movement of the second panel (202) ensures that the second panel comes to lie in the same plane as the first panel (201), and the two panels (201, 202) couple together by engagement of the connection element (220) of the second panel (202) on the connection point (225) of the first panel (201). This coupling (circled) ensures that on a further forward movement of the first panel (201), the first panel (201) can pull the second coupled panel (202) along in the same forward movement direction. FIG. 2(f) The third panel (203) can couple to the second panel (202) in the same way as described above, whereby the third panel (203) is also pulled along by the forward movement of the first panel (201).

FIG. 3 shows a detailed depiction of a first movable panel (201) comprising a connection system. The connection system comprises a connection element (220) which is arranged on the front panel wall of the panel (201) and can couple to a complementary connection point arranged on a rear panel wall of another panel (not shown). The connection element (220) comprises a downwardly pointing hook-like body which extends forward from the front panel wall; the hook-like body forms an L-shaped profile with a downwardly pointing hook structure. The connection system furthermore comprises a connection point (225) which is arranged on a rear panel wall of the panel (201) and can couple to a complementary connection element arranged on a front panel wall of another panel (not shown). The connection point (225) comprises an upwardly pointing hook-like body which extends rearward from the rear panel wall; the hook-like body forms an L-shaped profile with an upwardly pointing hook structure. The first panel (201) furthermore comprises a set of roller bearings to allow movement along the rail.

FIG. 4 shows a detailed depiction of a coupling between two adjacent panels, namely a first panel (201) and a second panel (202). The rear panel wall of the first panel (201) couples to the front panel wall of the second panel (202) by the engagement of the connection element (220) of the first panel (201) on the complementary connection point (225) of the second panel (202). In this exemplary embodiment, there are no openings between the two adjacent panel walls of the two coupled panels (201, 202). A seamless connection is obtained; both the top face and the bottom face of the coupled panels form an almost continuous and connected surface.

Example 2: Multi-Track Rail System

FIGS. 5 and 6 show diagrammatic depictions of two embodiments of roof devices comprising three panels (200) configured so as to be movable along a multi-track rail system (320). The panels (200) can move in different but parallel planes.

FIG. 5 illustrates a first embodiment in which the movable panels can move through the rail system while stacked one above the other. FIG. 5(a) In a first open roof state, all movable panels (200) are stacked one above the other. The bottommost panel (210) is fixed; it cannot move along the rail system (320). FIG. 5(b) The first movable top panel (201) is controlled so as to move in the forward direction along the first topmost part (321) of the multi-track rail system (320); this forward movement direction is indicated by a dotted arrow. A forward movement of the first panel (201) can ensure that the underlying movable panels (202, 203) move in the same forward direction; these underlying movable panels may for example be pulled along by the first panel (201). Alternatively, the underlying movable panels (202, 203) may each be controlled separately. FIG. 5(c) The forward movement means that the third movable bottom panel (203) no longer lies stacked above the fixed panel (210) and can move downward; this downward movement direction is indicated by a dotted arrow. FIG. 5(d) Because of the downward movement, the third movable panel (203) ends in the same plane as the fixed panel (210), so that the panels come to lie next to each other and aligned. FIG. 5(e) The remaining movable panels move forward until all movable panels (200) lie aligned next to each other in one and the same plane (and preferably adjoin each other seamlessly).

FIG. 6 illustrates a second embodiment in which the movable panels can move separately through the rail system. FIG. 6(a) is equivalent to FIG. 5(a) with the difference that each movable panel (200) is controlled separately. In FIG. 6(b), by way of example, the third movable bottom panel (203) is controlled first, so as to move forward along the multi-track rail system (310). FIG. 6(c) The third movable bottom panel (203) moves forward until it no longer lies stacked above the fixed panel (210) and can move downward; this downward movement direction is indicated by a dotted arrow. FIG. 6(d) The downward movement of the third panel (203) ensures that the third panel (203) ends in the same plane as the fixed panel (210). At the same time or subsequently, by way of example, the second panel (202) is controlled so as to move along the multi-track rail system (310) in the forward direction. FIG. 6(e) Each remaining movable panel moves forward separately until all movable panels (200) lie aligned next to each other in one and the same plane (and preferably adjoin each other seamlessly).

FIG. 7 shows a diagrammatic depiction of a roof device comprising three panels (200) configured so as to be movable along a multi-track rail system (310), wherein the roof device furthermore comprises a connection system.

The connection system comprises a connection element (220) and a complementary connection point (225); each movable panel (200) which is configured for coupling to adjacent panels comprises a downwardly pointing connection element (220) which is arranged on a front panel wall, and an upwardly pointing connection point (225) which is arranged on a rear panel wall. The multi-track rail system (320) comprises a plurality of parallel guide rails; namely a front and a rear guide rail per movable panel (200) which extend in a direction along which the opening roof slides open and closed. For the sake of simplicity, only the guide rails on one side of the rail system are shown in the illustration; the guide rails arranged on the opposite side of the roof frame are not shown.

Each movable panel (201, 202, 203) is preferably provided with at least one roller bearing per guide rail, i.e. at least four roller bearings in total. The bottommost panel (210) is fixed; it cannot move along the rail system (320). The first panel (201) is supported by a first front (331) and a first rear guide rail (341), the second panel (202) is supported by a second front (332) and a second rear guide rail (342), and the third panel (203) is supported by a third front (333) and a third rear guide rail (343). The front guide rails (331-333) are oriented sideways, and transform into a diagonal orientation. The rear guide rails (341-343) are oriented diagonally and transform into a downward orientation.

Correspondingly to the above-mentioned example, in FIG. 7(a) the movable panels (200) are completely stacked one above the other. FIG. 7(b) The third movable bottom panel (203), by way of example, is the first to move forward over the guide rails (333, 343) of the multi-track rail system (320). FIG. 7(c) The third panel (203) moves forward until the connection element (220) arranged on the rear panel wall of the third panel (203) overlaps with the connection point (225) arranged on the front panel wall of the fixed panel (210). FIG. 7(d) Thus the third panel (203) is able to move downward so that the connection element (220) of the third panel (203) can couple to the connection point (225) of the fixed panel (210). The third panel (203) comes to lie next to the fixed panel (210) in the same plane. FIG. 7(e) Then the second movable panel (202) also moves forward over the guide rails (332, 342) of the multi-track rail system (320) until the second panel (202) is able to couple to the third panel (203) in a similar fashion; namely by coupling of the connection element (220) of the second panel (202) with the connection point (225) of the third panel (203). FIG. 7(f) The remaining panels in turn also move forward until all movable panels lie aligned next to each other in one and the same plane (and preferably adjoin each other seamlessly).

Example 3: Connection System

The advantages of a connection system for use in a roof device have already been described in example 1 for a single-track rail system and in example 2 for a multi-track rail system. In example 3, a preferred embodiment of the connection system is described.

FIGS. 8A and 8B show diagrammatic depictions of two embodiments of roof devices (100) illustrating a coupling between two adjacent panels (201, 202), wherein the connection element (220) of the first panel (201) couples to the complementary connection point (225) of the second panel (202).

The connection point (225) comprises a first body which extends laterally forward from the front panel wall of the second panel (202). Squarely on the end of the first body is an upwardly pointing second body. The upwardly pointing second body runs diagonally in the direction of the front panel wall of the second panel with a low slope angle. The end of the second body is bent so that at least part of the second body extends back in the direction of the front panel wall of the second panel. The two bodies could also be regarded as one continuous body with one or more bends.

The connection element (220) comprises a first body which extends laterally rearward from the rear panel wall of the first panel (201). Squarely on the end of the first body is a downwardly pointing second body. The downwardly pointing second body is partially curved in order to form a step-like surface with a structure which corresponds to the surface of the complementary connection point (225). The end of the second body is bent so that at least part of the second body extends back in the direction of the rear panel wall of the first panel. This form ensures that, on a downward movement of the first panel (201) onto the second panel (202), the connection element (220) can engage on the connection point (225) in order to connect the two coupled panels (201, 202). The first panel (201) furthermore comprises a stiffening element (290) comprising an upwardly pointing body which extends laterally from the rear panel wall of the first panel (201). The stiffening element (290) is connected to the connection element (220), in particular by a front part of the body of the connection element (220) which extends rearward from the rear panel wall of the first panel (201). The stiffening element (290) stands perpendicularly relative to the top face of the first panel (201). It is clear that, according to the exemplary embodiment shown, the stiffening element (290) extends upward from the connection element (220) in such a way that the stiffening element (290) extends upwardly further or higher than the top face of the first panel (201). In other words, the stiffening element (290) which is arranged on or above the connection element (220) protrudes above the top surface of the first panel (201). It is clear that in this way, the stiffening element which extends upward on the top of the panel increases the surface moment of inertia of the cross-section of the connection element and the panel, since a large part of the surface of the cross-section of the stiffening element (290) lies at a greater distance from the centre of gravity of the assembly of the connection element (220) and the stiffening element (290), in particular in the height direction of the first panel (201). It is here furthermore clear that, since the flexion of said assembly is inversely proportional to the surface moment of inertia of the cross-section of said assembly, said assembly can offer better resistance to flexion, in particular in the height direction which is the direction in which the greatest load can be expected, for example loads from the influence of a layer of snow, wind load etc. Preferably, as shown the stiffening element extends approximately vertically upward, or in other words approximately transversely relative to the almost horizontal top surface of the first panel (201), since in this manner the distance of the surface of the cross-section of the stiffening element (290) relative to the centre of gravity is maximized, or the surface moment of inertia and resistance to flexion are maximized. Approximately vertically and/or approximately transversely here means a deviation of maximum+/−10°, preferably a deviation of maximum+/−5°, preferably a deviation of +/−3° relative to the vertical or transverse direction. Preferably, the height of this stiffening element (290), or in other words the distance by which the stiffening element (290) protrudes above the top surface of the first panel (201), or in yet other words the length of the stiffening element (209) in the vertical direction, is selected so as to give an increased flexion resistance of the assembly formed by the stiffening element (290) and the connection element (220). Preferably, the height of the stiffening element (290) is greater than the thickness of the first panel (201), preferably 150% or more of the thickness of the first panel (201). Preferably, the distance in the vertical direction by which the stiffening element (290) protrudes above the top surface of the first panel (201) is greater than the thickness of the first panel (201), preferably 150% or more of the thickness of the panel (201). It is clear that the stiffening element (290), for example by achieving an increased flexion resistance as described above, achieves an increased stiffness of the assembly. By the coupling between the connection element (220) of the first panel (201) and the connection point (225) of the second panel (202), the stiffening element (290) can support the second panel (202), and loads on the surface of the roof device can be spread over the plurality of coupled panels. It is however clear that embodiments of the stiffening element (290) as described above, for example with reference to the first panel (201) and the adjacent panel (220), may also be applicable to more than one such panel (201) of a roof device, preferably even to each panel of such a roof device, more particularly to each movable panel of such a roof device. It is thus clear that according to such embodiments, the roof device comprises at least one panel comprising at least one stiffening element which is configured to support an adjacent panel. Such embodiments are included for example in this description with reference to FIG. 11A, FIG. 11B, FIG. 12A and FIG. 12B, wherein each panel comprises an embodiment of at least one such stiffening element 290.

FIG. 8A shows in particular a first embodiment in which a slidable clip (230) is placed on an end of the connection element (220). In this embodiment, the connection element (220) can couple slidably with the connection point (225). During coupling, this clip (230) comes into contact with an end of the connection point (225) of the second panel (202), whereby the body of the connection point (225) can slide over the clip (230). The clip (230) limits the friction between the bodies of the connection element (220) and the connection point (225), and thereby improves the coupling/decoupling.

FIG. 8B shows in particular a second embodiment in which a roller bearing (235) is attached to an end of the connection element (220). In this embodiment, the connection element (220) can couple rollably with the connection point (225). During coupling, this roller bearing (235) comes into contact with an end of the connection point (225) of the second panel (202), whereby the body of the connection point (225) can roll over the roller bearing (235). The roller bearing (235) prevents friction between the bodies of the connection element (220) and the connection point (225), and thereby improves the coupling/decoupling.

FIGS. 9A and 9B show illustrations of the first embodiment of FIG. 8A (with sliding clip) in perspective. As well as the features and components described above, FIGS. 9A and 9B illustrate the scope of the openings formed between firstly the rear panel wall of the first panel (201) and secondly the front panel wall of the first panel (201) on coupling of the connection point (225) to the connection element (220). The scope and form of the opening may be adapted by changing the form of the connection point (225) and/or the connection element (220), and/or by the presence of further panel walls and/or protruding structures. It is thus clear that the clip (230) or the roller bearing (235) which is attached to an end of the connection element (220) is configured so as, during coupling, to come into contact with an end of the connection point (225) of the adjacent panel (200) and limit the friction between the connecting element (220) and the connection point (225). It is thus furthermore clear that according to an alternative embodiment, the clip (230) or the roller bearing (235) which may be attached to an end of the connection point (225) is configured so as, during coupling, to come into contact with an end of the connection element (225) of the adjacent panel (200) and limit the friction between the connecting element (220) and the connection point (225).

FIG. 9A shows a top perspective in which a gutter (221) is formed on the surface of the upwardly directed opening, between the front panel wall of the second panel (202) and the connection element (220) of the first panel (201). This gutter (221) may be suitable for lateral rainwater drainage. The gutter runs over the complete width of the panels (201, 202).

FIG. 9B shows a bottom perspective in which, on the surface of the downwardly directed opening, an intermediate space (226) is formed between the rear panel wall of the first panel (201) and the connection point (225) of the second panel (202). This intermediate space (226) may be suitable for accommodating a light-emitting element such as an LED strip, and the necessary electrical wiring, or a decorative element.

FIG. 10 shows a diagrammatic illustration of the connection system described above, according to the second embodiment of FIG. 8B (with roller bearing). FIG. 10(a) shows a non-coupled state in which a connection element (220) of a first top panel (201) is situated above a connection point (225) of the second bottom panel (202). This position may be achieved for example by a multi-track rail system as described in example 2. In FIG. 10(b), on a downward movement of the first panel (201), the roller bearing (235) attached to one end of the connection element (220) comes into contact with an end of the connection point (225). FIG. 10(c) The connection element (220) rolls over the body of the connection point (225) until the roller bearing comes into contact with an arcuate bend in the upwardly pointing body of the connection point (225), which grips the roller bearing. FIG. 10(d) The rollable coupling between the connection element (220) and the connection point (225) here forms an upwardly directed gutter (221) and a downwardly directed intermediate space (226).

FIGS. 11 and 12 show diagrammatic illustrations of the connection system described above, used in a roof device comprising a multi-track rail system (310). FIG. 11A shows an open roof state in which the movable panels are stacked one above the other. In the open roof state, the stiffening elements (290) of the plurality of movable panels (200) are placed against each other so as not to limit the stackability of the movable panels. FIG. 11B shows a closed roof state in which the movable panels lie aligned next to each other in one and the same plane. The stiffening elements (290) of the front panels can improve the stiffness of the rear panels. The loads can be distributed between the adjacent and coupled panels by means of the connection system. In this exemplary embodiment, the fixed (not movable) panel (210) also comprises a stiffening element (290). The stiffening elements (290) of the plurality of movable panels (200) on the surface of the roof form a rib structure which can improve the stiffness of the roof over its complete surface. FIG. 12A shows a further embodiment of the roof device of FIG. 11A, in which the first top panel (201) comprises a second stiffening element (295) arranged on a front panel wall. The presence of a stiffening element (290) at each end of the roof may further improve the stiffness of the roof over its entire surface. FIG. 12B shows a detailed depiction of the panels stacked one above the other in FIG. 12A.

Example 4: Stacking System

The advantages of a stacking system for use in a roof device have already been described in example 2 for a multi-track rail system. In example 4, a further preferred embodiment of the connection system is described.

FIG. 13 shows a detailed depiction of a first movable panel (201) comprising a stacking system. The stacking system comprises a downwardly pointing engagement element (250) which is arranged on a bottom panel wall of the panel (201) and which fits into a compatible notch (245) arranged on a top panel wall of an adjacent panel (not shown). The depth and width of the notch (245) correspond approximately to the length and width of the downwardly pointing engagement element (250), so that the notch (245) can fully surround the engagement element (250). The panel (201) also comprises such a notch (245) on the top panel wall. The stacking system furthermore comprises an upwardly pointing guide element (240) which is arranged on a top panel wall of the panel (201) and can abut against a downwardly pointing protrusion (250) arranged on a bottom panel wall of an adjacent panel (not shown).

FIGS. 14 and 15 show a diagrammatic depiction of a roof device (100) comprising at least two movable panels (200) configured so as to be movable along a multi-track rail system (320), wherein the roof device furthermore comprises a stacking system. FIG. 14 shows an embodiment of the stacking system in which the movable panels move from an open roof state to a closed roof state. FIG. 15 shows an embodiment of the stacking system in which the movable panels move from a closed roof state to an open roof state.

FIG. 14(a) shows that two movable panels (201, 202), which are stacked one on the other, move forward (i.e. in the direction of the front panel wall) over separate guide rails of the multi-track rail system (320); the forward movement is indicated by a dotted arrow. The first movable panel (201) moves along a first front (331) and a first rear guide rail (341), and the second movable panel (202) moves along a second front (332) and a second rear guide rail (342). The two panels are coupled together by means of the stacking system (circled): the downwardly pointing protrusion (250) of the first panel (201) is completely enclosed by the notch (245) of the second panel (202). This coupling means that the second panel is pulled by the first panel (201) along the rail system (320) by the forward movement of the first panel (201). FIG. 14(b) The second panel (202) can move forward until a front edge of the second panel (202) comes into contact with an end of the second front guide rail (332); this end ensures that the forward movement of the second panel (202) is blocked (solid arrow). FIG. 14(c) The rear edge of the second panel (202) can move further downward along a downwardly pointing end of the second rear guide rail (342). This downward movement of the second panel (202) can ensure that the coupling between the downwardly pointing protrusion (250) of the first panel (201) and the notch (245) of the second panel (202) is released. FIG. 14(d) The decoupling enables the first panel (201) to move forward unhindered along the guide rails (321, 331). It is furthermore clear that alternative embodiments are possible in which, instead of the bottom movable panel (200) as described above, any other suitable movable panel (200) may be decoupled from the plurality of movable panels (200) stacked one above the other, by decoupling of the stacking system.

FIG. 15(a) shows a first movable panel (201) which moves rearward (i.e. in the direction of the rear panel wall) along a first front (331) and a first rear guide rail (341); the rearward movement is indicated with a dotted arrow. A second movable panel (202) lies below the first panel (201); this second panel (202) may for example lie aligned in the plane in a closed roof state. FIG. 15(b) The first panel (201) can move rearward unhindered until the downwardly pointing protrusion (250) of the first panel (201) comes into contact with the upwardly pointing protrusion (240) of the second panel (202). FIG. 15(c) This contact means that the first panel (201) can push the second panel (202) on a further rearward movement of the first panel (201). A rearward movement of the second panel (202) firstly ensures that the second panel (202) moves upward along a downwardly pointing end of the second rear guide rail (not shown on the illustration). The upward movement means that the notch (245) of the second panel (202) completely encloses the downwardly pointing protrusion (250) of the first panel (201). The two adjacent panels (201, 202) are coupled together by means of the stacking system (circled). FIG. 15(d) The two coupled panels (201, 202) can then move rearward together, preferably aligned and stacked one above the other, over separate guide rails of the multi-track rail system (320). 

1. A roof device for an opening roof comprising: a plurality of stackable panels configured to be movable along a rail system, wherein the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for repeatable coupling to and decoupling from the connection point of an adjacent panel, on coupling, the adjacent panels configured to lie aligned in the same plane, and on decoupling, the adjacent panels configured to be stacked one above the other; and a clip or a roller bearing attached to an end of the connection element, the connection point, or a combination thereof, wherein the clip or the roller bearing is configured, during coupling, to come into contact with at least one of an end of the connection point and the connection element of the adjacent panel and limit the friction between the connection element and the connection point.
 2. The roof device as claimed in claim 1, wherein the end of at least one of the connection element and the connection point comprises a sliding clip configured for slidable coupling or a roller bearing configured for rollable coupling.
 3. The roof device as claimed in claim 1, wherein the coupling of the connection point to the connection element forms a gutter suitable for lateral water drainage.
 4. The roof device as claimed in claim 1, wherein the connection point forms a stop, and wherein the connection element forms a hook which can engage in or attach to the connection point.
 5. The roof device as claimed in claim 1, wherein the connection point comprises an upwardly pointing body which extends laterally from a panel wall.
 6. The roof device as claimed in claim 5, wherein an end of the upwardly pointing body of the connection point is curved so that at least part of said body extends back in the direction of the panel wall.
 7. The roof device as claimed in claim 1, wherein the connection element comprises a downwardly pointing body which extends laterally from a panel wall.
 8. The roof device as claimed in claim 7, wherein an end of the downwardly pointing body of the connection element is curved so that at least part of said body extends back in the direction of the panel wall.
 9. The roof device as claimed in claim 1, wherein at least one of the connection element and the connection point comprises a body at least partially bent in order to form a curved surface with a shape which at least partially corresponds to a shape of an adjacent connection point or connection element.
 10. The roof device as claimed in claim 1, wherein at least one panel comprises at least one stiffening element which is configured so as to support an adjacent panel.
 11. The roof device as claimed in claim 10, wherein at least one stiffening element comprises an upwardly pointing body which extends laterally from a front or rear panel wall.
 12. The roof device as claimed in claim 1, wherein the coupling and/or decoupling of adjacent panels sequentially follows the stacking order of the panels.
 13. The roof device as claimed in claim 1, wherein the rail system is a single-track rail system, wherein the panels move along the same plane.
 14. The roof device (100) as claimed in claim 1, wherein the rail system is a multi-track rail system, wherein the panels move along different planes.
 15. An opening roof for a terrace covering, comprising a roof device comprising: a plurality of stackable panels-configured to be movable along a rail system, wherein the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for repeatable coupling to and decoupling from the connection point of an adjacent panel, on coupling, the adjacent panels configured to lie aligned in the same plane, and on decoupling, the adjacent panels configured to be stacked one above the other; and a clip or a roller bearing attached to an end of the connection element, the connection point, or a combination thereof, wherein the clip or the roller bearing is configured, during coupling, to come into contact with at least one of an end of the connection point and the connection element of the adjacent panel and limit the friction between the connection element and the connection point.
 16. The roof device as claimed in claim 1, wherein the coupling of the connection point to the connection element forms an intermediate space suitable for receiving a light-emitting element.
 17. The roof device as claimed in claim 10, wherein the stiffening element is arranged on a connection element of the panel and is configured to support the connection point of the adjacent panel.
 18. The roof device as claimed in claim 11, wherein the upwardly pointing body of the stiffening element stands perpendicularly on the top panel wall or the connection element.
 19. The roof device as claimed in claim 11, wherein the stiffening element comprises an L-shaped angled profile.
 20. The roof device as claimed in claim 13, wherein the panels move sequentially next to each other.
 21. The roof device as claimed in claim 14, wherein the different planes are parallel planes.
 22. The roof device as claimed in claim 14, wherein the panels move simultaneously while stacked one above the other. 